test_subprocess.py 文件源码

def test_send_signal(self):
        code = 'import time; print("sleeping", flush=True); time.sleep(3600)'
        args = [sys.executable, '-c', code]
        create = asyncio.create_subprocess_exec(*args, loop=self.loop, stdout=subprocess.PIPE)
        proc = self.loop.run_until_complete(create)

        @asyncio.coroutine
        def send_signal(proc):
            # basic synchronization to wait until the program is sleeping
            line = yield from proc.stdout.readline()
            self.assertEqual(line, b'sleeping\n')

            proc.send_signal(signal.SIGHUP)
            returncode = (yield from proc.wait())
            return returncode

        returncode = self.loop.run_until_complete(send_signal(proc))
        self.assertEqual(-signal.SIGHUP, returncode)